Update ingress godeps

vendor/k8s.io/kubernetes/pkg/util/cache/lruexpirecache.go

@@ -0,0 +1,66 @@
+/*
+Copyright 2016 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package cache
+
+import (
+	"sync"
+	"time"
+
+	"github.com/golang/groupcache/lru"
+)
+
+type LRUExpireCache struct {
+	cache *lru.Cache
+	lock  sync.RWMutex
+}
+
+func NewLRUExpireCache(maxSize int) *LRUExpireCache {
+	return &LRUExpireCache{cache: lru.New(maxSize)}
+}
+
+type cacheEntry struct {
+	value      interface{}
+	expireTime time.Time
+}
+
+func (c *LRUExpireCache) Add(key lru.Key, value interface{}, ttl time.Duration) {
+	c.lock.Lock()
+	defer c.lock.Unlock()
+	c.cache.Add(key, &cacheEntry{value, time.Now().Add(ttl)})
+	// Remove entry from cache after ttl.
+	time.AfterFunc(ttl, func() { c.remove(key) })
+}
+
+func (c *LRUExpireCache) Get(key lru.Key) (interface{}, bool) {
+	c.lock.RLock()
+	defer c.lock.RUnlock()
+	e, ok := c.cache.Get(key)
+	if !ok {
+		return nil, false
+	}
+	if time.Now().After(e.(*cacheEntry).expireTime) {
+		go c.remove(key)
+		return nil, false
+	}
+	return e.(*cacheEntry).value, true
+}
+
+func (c *LRUExpireCache) remove(key lru.Key) {
+	c.lock.Lock()
+	defer c.lock.Unlock()
+	c.cache.Remove(key)
+}